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/freebsd-9.3-release/sys/boot/i386/cdboot/ | ||
H A D | cdboot.S | diff 157652 Tue Apr 11 02:39:29 MDT 2006 sobomax When enabling A20 put upper limit on amount of time we wait for the keyboard controller to get ready (65K x ISA access time, visually around 1 second). If we have wait more than that amount it's likely that the hardware is a legacy-free one and simply doesn't have keyboard controller and doesn't require enabling A20 at all. This makes cdboot working for MacBook Pro with Boot Camp. MFC after: 1 day |
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